Abstract: A gas sensor 10 has a measuring channel 11 with a gas inlet 12 and with a gas outlet 13, at least one receptor layer 20, a reference electrode 30 and a voltage-controlled analysis unit 50. The reference electrode 30 is capacitively coupled with the receptor layer 20. The reference electrode 30 is connected to the analysis unit 50 in an electrically conductive manner. The receptor layer 20 is formed in measuring channel 11. The measuring channel 11 forms a dielectric layer between the receptor layer 20 and the reference electrode 30. The receptor layer 20 has a support 21 and an analyte-binding layer 22. The present invention provides for the analyte-binding layer 22 to be a self-assembling monolayer (SAM).

Abstract: A gas sensor 10 has a measuring channel 11 with a gas inlet 12 and with a gas outlet 13, at least one receptor layer 20, a reference electrode 30 and a voltage-controlled analysis unit 50. The reference electrode 30 is capacitively coupled with the receptor layer 20. The reference electrode 30 is connected to the analysis unit 50 in an electrically conductive manner. The receptor layer 20 is formed in measuring channel 11. The measuring channel 11 forms a dielectric layer between the receptor layer 20 and the reference electrode 30. The receptor layer 20 has a support 21 and an analyte-binding layer 22. The present invention provides for the analyte-binding layer 22 to be a self-assembling monolayer (SAM).

Abstract: A gas sensor 10 has a measuring channel 11 with a gas inlet 12 and with a gas outlet 13, at least one receptor layer 20, a reference electrode 30 and a voltage-controlled analysis unit 50. The reference electrode 30 is capacitively coupled with the receptor layer 20. The reference electrode 30 is connected to the analysis unit 50 in an electrically conductive manner. The receptor layer 20 is formed in measuring channel 11. The measuring channel 11 forms a dielectric layer between the receptor layer 20 and the reference electrode 30. The receptor layer 20 has a support 21 and an analyte-binding layer 22. The present invention provides for the analyte-binding layer 22 to be a self-assembling monolayer (SAM).

Abstract: A gas sensor for the detection of gases and vapors in air is particularly for the detection of anesthetic gases. A method for the detection and for the monitoring of such gases is also provided including detecting anesthetic gases with the gas sensor.

Abstract: A sensor unit (10) for detecting a gas is configured with a pressure-tight measuring channel (11), with a gas inlet (12) for introducing the gas into the measuring channel, with a gas outlet (13) for removing the gas from the measuring channel, and with a pump unit (14) for evacuating the measuring channel. The measuring channel has a gas sensor (15) for detecting the gas and a heating unit (16) for heating the gas sensor. The sensor unit (10) is configured to be operated in a measuring mode and in a regeneration mode. The measuring channel (11) is evacuated and the gas sensor (15) is heated in the regeneration mode.

Abstract: A gas-measuring chip (10), used with a gas-measuring device (100) of a portable chip measurement system, has a carrier (11) and measuring channels (20, 20?, 20?). A regenerable, nonconsumable sensor (30, 30?, 30?) is arranged in each measuring channel. A method includes inserting the gas-measuring chip (10) into the gas-measuring device (100) and connecting one measuring channel of the gas-measuring chip (10) to a pumping system (120, 121) of the gas-measuring device (100). A measurement is carried out with a first measuring channel (20, 20?, 20?) with a switching over to a measuring channel different from the first measuring channel. The sensors (30, 30?, 30?) of the measuring channel used last is regenerated and optionally simultaneously there is a measurement with the measuring channel switched over to. There is a switching over to a measuring channel, which is different from the measuring channel last used for the measurement.

Abstract: A gas sensor 10 has a measuring channel 11 with a gas inlet 12 and with a gas outlet 13, at least one receptor layer 20, a reference electrode 30 and a voltage-controlled analysis unit 50. The reference electrode 30 is capacitively coupled with the receptor layer 20. The reference electrode 30 is connected to the analysis unit 50 in an electrically conductive manner. The receptor layer 20 is formed in measuring channel 11. The measuring channel 11 forms a dielectric layer between the receptor layer 20 and the reference electrode 30. The receptor layer 20 has a support 21 and an analyte-binding layer 22. The present invention provides for the analyte-binding layer 22 to be a self-assembling monolayer (SAM).

Abstract: A gas sensor for the detection of gases and vapors in air is particularly for the detection of anesthetic gases. A method for the detection and for the monitoring of such gases is also provided including detecting anesthetic gases with the gas sensor.

Abstract: A sensor unit (10) for detecting a gas is configured with a pressure-tight measuring channel (11), with a gas inlet (12) for introducing the gas into the measuring channel, with a gas outlet (13) for removing the gas from the measuring channel, and with a pump unit (14) for evacuating the measuring channel. The measuring channel has a gas sensor (15) for detecting the gas and a heating unit (16) for heating the gas sensor. The sensor unit (10) is configured to be operated in a measuring mode and in a regeneration mode. The measuring channel (11) is evacuated and the gas sensor (15) is heated in the regeneration mode.

Abstract: A gas detector (25) has an electron source (1), which emits electron pulses into a reaction chamber (26) through a membrane (10). The ions formed in the reaction chamber (26) by the electron beam can be detected by means of a current detector (30) by a transfer field pulse being generated in the reaction chamber. The gas sensor (25) may have especially a miniaturized design.

Abstract: An ion mobility spectrometer is provided with at least one ionization chamber (1) through which analyte-containing gas can flow. A radiation source (2) is provided from which ionizing radiation is suitable for ionizing the analyte-containing gas at least partially, enters the ionization space (1). A separation area is located behind the ionization space (1) in the direction of flow, into which the partially ionized gas is admitted as an ion carrier gas (4) and a nearly ion-free gas is admitted as a drift gas (5) in such a way that a flow in which predominantly ion carrier gas (4) flows through cross-sectional areas (6) and predominantly drift gas (5) flows through other cross-sectional areas (7, 7?), becomes established at least in the inlet area of the separation area (8).

Abstract: A device for spectroscopy using charged analytes has an electron generator, which sends electrons through membrane into a charging chamber. The thermal strain of the membrane may be lowered significantly if a material is selected for the membrane which contains at least one component from the group of oxides, nitrides, and carbides with at least one of the elements B, Al, C, Si, and Ti or polysilicon.

Abstract: An ion mobility spectrometer is provided including at least one ionization chamber (1), which can be passed through by analyte-containing gas and at least one radiation source (2), from which ionizing radiation which is suitable for at least partially ionizing the analyte-containing gas enters the ionization chamber (1). At least one transition area (3) is provided, into which the at least partially ionized gas as ion carrier gas (4) and an almost ion-free gas as drift gas (5) can be charged in a way that, at least at the end of the transition area (3), a flow is established, in which cross-sectional areas (6) are mainly passed through by ion carrier gas (4) and other cross-sectional areas (7, 7?) are mainly passed through by drift gas (5).

Abstract: A device for spectroscopy using charged analytes has an electron generator, which sends electrons through membrane into a charging chamber. The thermal strain of the membrane may be lowered significantly if a material is selected for the membrane which contains at least one component from the group of oxides, nitrides, and carbides with at least one of the elements B, Al, C, Si, and Ti or polysilicon.

Abstract: A biomimetic reagent system is provided containing an oxygen donor and a catalyst based on porphyrin, which are applied to a carrier. A device that contains the system is also provided for determining components of gas or vapor samples, especially aromatics, such as benzene. A process for hydroxylating aromatics, such as benzene, using the biomimetic reagent system is also provided.

Abstract: A testing elements for the calorimetric determination of oxidizable gas and/or vapor components in gas mixtures is provided. The testing element contains, besides usual oxidizing agents, at least one redox indicator, which is in the oxidized form. The redox indicator is preferably a benzidine derivative according to the general formula in which the radicals R are identical or different and denote a hydrogen, alkyl, aryl, halogen, trifluoromethyl, cyano, nitro, dialkylamino, ester, sulfoxyl ester, alkyloxy or aryloxy, X denotes a halogen, Y denotes a trifluoromethyl, cyano, nitro, dialkylamino, ester, sulfoxyl ester, alkyloxy or aryloxy, n is an integer from zero to three, and m equals 5−n. The testing elements are preferably designed as detector tubes that contain carrier materials, to which the oxidizing reagents and redox indicators are applied.

Abstract: Bis-(1-alkyl-5-nitro-imidazolyl)-compounds as well as a process for their manufacture are described. The compounds are active against protozoal diseases.